Crucible-furnace.



)SUCIBLE FURNACEI APMCAUON man wov. i4, 19:4.

Patented May l1, 1915 3 SHEETS-SHEET! L HALLGRN CRUCIBLF. FURNACE.'

APPLecATxoN man Now-4.1914.

A T17 'GENE Y.

. fied, in which the cost for INNSYLVANE.

Specicatior. of Setters meeneem Mey M1915.

T0 all 'whom t may concern f Be it known that l, EMIL HALLGREN, e citizen of the United States, residing; :it 304C Riverview, Bellevue, in county of fillegheny and Starte of Fennsylvnis., in Vented certain new and useful improve ments in Crucible-Furnaces, of which the following is e spcciiication.

The present invention to new und useful improvements in cruciblc nieting' furnaces.

One object of the invention is the provi sion of a. furnace including e melting chen;n

ber with stationery Wells Weil as e ste tionen-,V arched root, 'the scid Wfdis being' supported upon o suitable bese provided with on opening through which e movable bottoni, upon which the crue,

stond, cenxbe removed in' o. VerI Another object of this inve non the provision et' ...insee enc-Ye speciied type, wherein e greet sev G o .i .bor is duced to the ininiuiurn, on s' nature of the construction ing no loose tiles in the walls und eli. oi the movable parte' being; thoroughly lockedV in position.

Still another object of the ini" tion is the provision of e the Waste or loss of crucbles with valuable contents is prevented, by the s and` steady movements of the .bottom Wi the said crucibles supported thereon which can be more conveniently handled when the Suid bottom is removed.

A urtheriobject of the presentinveutiou resides iu the provision. of n. furnace, where in,-- by the arrangement of the meltingchsuber and furnace ports, and the designs ing thereof to hold more crucibles, the out?, put thereof will be materially increased.

still further object or' this invention is o .improve end simplify devices of this i ineXpensive to manufacture, re-

eand eiicient lin use, and readily operbe understood in this connecous minor changes in the spei' construction can be resorted scope of the 4appended claim,

ein

without deperting from the spirit or secri" rendering them comperetivelyfl doing any o. Ythe advantages of the invenclou.

ii/lith the above and other objects in View 2 invention resides in the nove es oi: construction, formetions,'com` ons and arrangements of parts to be incre fully described, claimed jte-5i in the accompanying drawis e vertical sectional ifiew,

nece constructed in accordance the center of mmelting chamy with my invention, on `the line A-A of 3, 4:, 5, o, and 7. Fig. 2 is e vertical sectionalA few, take nthrough the melting and regeneration xchambers, .--li oit 3. Fig. Bris e horil' 'f ie une C-C Fig. l. Fig. 4 Joue@ sectional View teken through d chamber. Fig.. 5 is a hori View teken through port indicated. by the secin l, 2, 3, 4, and 5..

Y Fig. l. s to the eocompenygingvdrqgwings cher" eters of .reference throughout metal' base plete 2, having upper side the bottom lining 4:. The opposite sides of the melting 'chamber are proided *with port openings 5 5, which are -cction with the opposite Vertical in conunu dues @M6 which constitute the mixin chem` :j

The opposite'rght and 1e t hand bers. cir ues, are shown at 7 andt 8, and connect each of the vertical iues 6, with the` right and left hand air Vregeneration chambers '11s und l2 respectively. The right .and left hand :fiu 9 and l0 arel shogn clearly en `through the melting;

. chamber. Figi' 6 is s Verf' iew teken through the cen-- zerein closed normally by the.`- in o, which has attached to its f sectional view,-taken on f NWS, the numeraLl denotes a i er of the furnace, Wllch 1s in the drawings and connect the before men- ,ticned lues 6, with the right and left hand gas regeneration chambers 13 and 14. The above described air rines 7 and 8 are controlled by the `valves 15, While the gas lues 9 and 10 are controlled by similar valves i6, in order that the air and gas can be shut oil' from the melting chamber 1. i/Vhen the bottom 3 is to be lowered therefrom, this 'bottom 3 and l is su ported and actuated by the plunger head li, attached to the plun- 'ger rod 18, which has a vertical cylinder 419 securedto main base 20. The plunger head slides along the vertical guides 21 and is Controlled at the will of the operator, to raise or lower the bottom 3 and 4.

The plunger head 1'7 has guides 17 there on, which engage the vertical columns 21, which retain the head 17 in proper position during its vertical movement, while `inder 25 is mounted below the operators platform 26. This cylinder corresponds to the Vertical cylinder 19 and is provided 'with a plunger therein which is attached to the cross head 2%.

When in operation the crucibles areplaced upon the bottom lining 4, within the melting chamber l and the valves l5 and 16 controlling the supply of air and gas are ope and the bottom of the inciting chambf retained in its closed position .until tl cibles, the air and gas are then turned olf,

operator desires to remove thesa'id cruand the bottom 3 and 4L, upon whichthe'.'

crueibles are carried is lowered, until ythe same rests upon the horizontal guides, wltli' tion, what l claim as new 'and desire to pro- Lect by Letters Patent is:

ln a furnace oi the character described, a melting chamber having an open lower end, stationary sidewalls and solid roof for said melting chamber, a vertically movable bottom, closing said open lower end,1 a plunger supporting said movable bottom, means for actuating the plunger. to move said bottom away from and toward said opening, horizontal guides disposedbelow the meltingchamber for supporting the bottom when in its lowermost position, a cross head slidable upon the guides, in interlocking` engagement between the cross headand bottom, Aeans for actuating the cross head to move the bottom horizontally out of the vertical path of movement and a platform in the line of horizontal movement of the bottom.

in testimony whereof, l ailiX my signature in presence of two witnesses.

EMIL HALLGREN. lVitnesses RALPH DONATH, l. V. V. M'Unnn'rioNs.

point adjacent the plat-iv 

